May weather forecast and climate
Katonah, NY

Weather in May

May, the last month of the spring, in Katonah, is an enjoyable month, with average temperature ranging between max 67.8°F (19.9°C) and min 51.1°F (10.6°C).

Temperature

In May, the average high-temperature rises, from a mild 56.8°F (13.8°C) in April, to a comfortable 67.8°F (19.9°C). In Katonah, New York,, the average low-temperature is 51.1°F (10.6°C).

Humidity

In May, the average relative humidity is 76%.

Rainfall

In May, the rain falls for 15.6 days. Throughout May, 2.01" (51mm) of precipitation is accumulated. Throughout the year, there are 144.2 rainfall days, and 22.32" (567mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Katonah. During 0.1 snowfall days, Katonah aggregates 0.16" (4mm) of snow. Throughout the year, there are 23.1 snowfall days, and 9.02" (229mm) of snow is accumulated.

Daylight

In Katonah, the average length of the day in May is 14.5h.

Sunshine

In May, the average sunshine in Katonah, New York, is 8.7h.

UV index

In Katonah, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in May in Katonah?

The average relative humidity in May in Katonah is 76%.

How many days does it rain in May in Katonah?

In May, in Katonah, New York, the rain falls for 15.6 days. Throughout May, 2.01" (51mm) of precipitation is accumulated.

What is the last month it snows in Katonah?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Katonah aggregates 0.16" (4mm) of snow.

How many hours of daylight does Katonah have in May?

In May, the average length of the day in Katonah, New York, is 14.5h.

How long on average sun shines in May in Katonah?

In May, the average sunshine in Katonah is 8.7h.

What is the UV index reading in May in Katonah?

The average daily maximum UV index in May in Katonah is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in May
Katonah, NY

Average temperature in May - Katonah, NY
  • Average high temperature in May: 67.8°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in May: 51.1°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

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Average pressure in May
Katonah, NY

Average pressure in May - Katonah, NY
  • Average pressure in May: 30.01"

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in May
Katonah, NY

Average wind speed in May - Katonah, NY
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in May
Katonah, NY

Average humidity in May - Katonah, NY
  • Average humidity in May: 76%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in May
Katonah, NY

Average rainfall in May - Katonah, NY
  • Average rainfall in May: 2.01"

The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is February (1.18").

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Average rainfall days in May
Katonah, NY

Average rainfall days in May - Katonah, NY
  • Average rainfall days in May: 15.6 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (6.8 days).

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Average snowfall in May
Katonah, NY

Average snowfall in May - Katonah, NY
  • Average snowfall in May: 0.16"

The month with the highest snowfall is March (2.95").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Katonah, NY

Average snowfall days in May - Katonah, NY
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (6.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Katonah, NY

Average daylight in May / Average sunshine in May - Katonah, NY
  • Average daylight in May: 14.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in May: 8.7h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in May
Katonah, NY

Average sunshine days in May - Katonah, NY
  • Average sunshine days in May: 13.3 days

The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is June (12.1 days).

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Average UV index in May
Katonah, NY

Average UV index in May - Katonah, NY
  • Average UV index in May: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in May
Katonah, NY

Average cloud cover in May - Katonah, NY
  • Average cloud cover in May: 45

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in May
Katonah, NY

Average visibility in May - Katonah, NY
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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